Product Details
C3-15B+ Upper/Lower-Limit Temperature Difference Controller, mainly used in hot water circulation and return-water system control.
It intelligently detects the temperature difference between a [High-Temperature Point (e.g., collector)] and a [Low-Temperature Point (e.g., tank)]. When the [Temperature Difference] reaches the user's preset value, a relay output automatically activates a [Circulation Pump] or other load to circulate the high- and low-temperature media for heat exchange, reducing the temperature difference (abbreviated as "differential temperature") between the two zones.
BF-15B+ is designed to activate only on a positive temperature differential; a negative differential will not activate the output. Very easy to operate: simply adjust the upper and lower differential temperature limits to implement control.
The wide-range power supply automatically adapts to AC80V–240V for stable, reliable, long-term operation.
Product key features
Two 240K NTC temperature sensor inputs
Normally open and normally closed output all the way
Temperature difference cycle function
Temperature difference display
Temperature measurement deviation correction function
Power-off memory protection function
Typical Product Applications
Product Technical Parameters
| Operating Power and Power Consumption | AC(80～240)V，2W |
| Usage environment | -10℃～50℃ |
| Display mode | Led digital display |
| Button | Push-type membrane buttons |
| Input | Two 240K NTC thermistor temperature sensor inputs, measurement range -20°C to 120°C |
| Output | 1. One relay with normally open and normally closed contacts controls differential-temperature circulation 2. The output contact is rated at 6A for resistive loads and 1A for inductive loads. Can control a 1000W electric heater or a 200W motor or pump; larger loads require an AC contactor |
| Measurement range | -99～120℃ |
| Set Range | 0～60℃ |
| Control Range | 0～60℃ |
| Other Parameters | 1. The temperature sensor signal cable can be extended with ordinary wire for long-distance use, up to 100 m. 2. Parameter settings are retained long-term after power loss. 3. Temperature control differential: 0°C to 30°C. |
Product packaging, specifications and weight
| Product Packaging List | 1. Host 2. NTC (240K) temperature sensor cables (2 pcs.) 3.User Manual 4.Mounting Bracket |
| Appearance dimension (mm) | L 72 x W 72 x D 60 |
| Installation and dimensions (mm) | Window mount with 68 × 68 openings |
| Weight | Net weight: 0.204Kg; gross weight: 0.264Kg |
